Energy surrounding terribly mannish hand (10)
I believe the answer is:
penmanship
'hand' is the definition.
(I know that penmanship is a type of hand)
'energy surrounding terribly mannish' is the wordplay.
'energy' becomes 'pep' (personal energy, vim).
'surrounding' is an insertion indicator.
'terribly' indicates an anagram.
'mannish' is an anagram of 'nmanshi'.
'pep' enclosing 'nmanshi' is 'PENMANSHIP'.
(Other definitions for penmanship that I've seen before include "Writing skill" , "Skill in handwriting" , "Calligraphy" , "hand" .)